When electric current flows through the metal element of a light bulb, electrical current energy is converted to

-- light energy (the whole purpose of current through the bulb)

-- heat energy (it can't be avoided)

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.